Looks like you really put alot of effort into it, the fire looks good
I can detect some things that could make it better , some of the shades doesn't make sence like the top of his head, ears, tail
you used dithering alot, but maybe instead try to dither with specific shapes instead of alot of dots,
There's somthing with those colors that doesn't work for me, try using some hue shifting, its great! :)
Here's a pallete I achieved just by playing with photoshop effects
fire, monkey, Fire Monkey avatars, Fire Monkey icons, Fire Monkey pixel art, Fire Monkey forum avatars, Fire Monkey AOL Buddy Icons
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Looks like you really put alot of effort into it, the fire looks good

I can detect some things that could make it better , some of the shades doesn't make sence like the top of his head, ears, tail
you used dithering alot, but maybe instead try to dither with specific shapes instead of alot of dots,
There's somthing with those colors that doesn't work for me, try using some hue shifting, its great! :)
Here's a pallete I achieved just by playing with photoshop effects
hope I could help in some way :x